How do you make your newborn nap during the day

My son is now 9 weeks old and he is a terrible sleeper. Like he will nap for about 5 minutes and then suddenly wake up full of energy. During the night I am getting one hour stretches but during the day he just doesn’t seem to want to sleep.

After being awake for far too long he is then exhausted and overly tired and will cry cry cry. I make him sleep by swaddling him, putting in his dummy and rocking him in my arms to sleep. Now if I keep him picked up he will sleep for longer stretches but the second I put him down his eyes are wide awake.

I really need some tips on how others make their newborns sleep as I also have a toddler (2 year old) and I feel like I don’t have any time for her. All help/advice is welcome with open arms. Thank you